You're probably on the right track. It looks like a clipped wing built up GLH II with trike gear and a canopy. I put trike gear on the fuselage of a GLH in the late 80s in an attempt to make a cheap sport plane that could take off and land on a Tartan track around the athletic field next to my office. Even with the LG it was too hot for flying that near campus.
Looks sort of like an Ace GLH. Was available with foam or built up wing.
Designed for a T.D. 49 to 51.
Wing span about 32 inchs?
Wm.